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One-third of the area covered with trees. About seventy percent of the trees bee

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One-third of the area covered with trees. About seventy percent of the trees bee

One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

A．is; hasB．is; haveC．are; haveD．are; has

试题答案

B

解析试题

标签：withcoveredtreesseventyabout

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